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Former Labour cabinet minister, Peter Hain, said a shared an interest between him and Prince Charles meant the Prince 'tried to persuade the Welsh government' to introduce a trial for complementary medicine.

"When I was Secretary of State for Northern Ireland in 2005-7, he was delighted when I told him that since I was running the place I could more or less do what I wanted to do.

"I was able to introduce a trial for complementary medicine on the NHS, and it had spectacularly good results, that people's well-being and health was vastly improved.

"And when he learnt about this he was really enthusiastic and tried to persuade the Welsh government to do the same thing and the government in Whitehall to do the same thing for England, but not successfully."

Prince Charles tried to influence Welsh Government policy according to a former Welsh Secretary. Peter Hain said that the Prince 'wanted complementary medicine' and that he was seen as "being somebody that actually agreed with him on this, and might want to deliver it."